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Big Flea

If your cat has fleas, you have fleas.

Fleas move in with their friends and family, invading not just your cat, but your home as well.

Advantage® II flea treatment for cats kills fleas through contact, effectively breaking the flea life cycle – so you can help protect your cat from the fleas you see and the ones you don't.

Not for human use.

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The Advantage® II advantage

Advantage® II for cats is a convenient, fragrance-free, monthly topical flea treatment for cats that kills fleas through contact so they don't have to bite your cat to die.

Scroll down for information about using Advantage® II for cats on ferrets.

30 DAY DAY
FLEAS FLEAS
Flea Larvae FLEA LARVAE
Flea Eggs FLEA EGGS

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Bayer's Advantage II for cats ratings & reviews
  • Advantage® II for cats kills fleas through contact, so fleas do not have to bite your cat to die.

We can help you stop fleas:

On Your Cat

Advantage® II for cats

Start your comprehensive flea infestation plan with Advantage® II for cats. It kills fleas through contact, so they do not have to bite to die.

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In Your Home

Advantage® Carpet & Upholstery Spot Spray

This indoor spray kills fleas, brown dog ticks, dust mites and bed bugs.

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In Your Yard

Advantage® Yard and Premise Spray

This outdoor spray kills insects, fleas and ticks around the perimeter of your home, on your deck and on your patio.

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Advantage II flea treatment on brown cat

Think your indoor cat isn't at risk for fleas? Think again.

  • Adult fleas can come into your home on people's clothing or other pets and you may not even know it. 

    So you might not realize that fleas may already be a problem on your cat. For one thing, due to cats' grooming behavior, it can be difficult to find adult fleas. By the time you recognize what is happening, your cat may have been bitten hundreds of times, and you more than likely will have a flea infestation problem.

    That's why Advantage® II flea control for cats works all month long to break the flea life cycle so you can help protect your cat and prevent an infestation.

See for yourself how Advantage® II gives you the upper hand in the fight against fleas.

  • How to apply Advantage® II for cats

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    View step-by-step details in the process. 0:59

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Guided by science — for 150 years.


See the story that lives behind Bayer's history of innovation.

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Advantage II infographic - fleas on cats


Advantage II fighting fleas on grey cat

The more you know, the better. For both you and your cat.

  • Learn about the ins and outs of fleas, flea infestation, how bites affect your cat, what can happen if left untreated and more.

    Flea life cycle & catsLearn More >

    Flea diseases in catsLearn More >

Did you know that Advantage® II is also available for dogs? SEE ADVANTAGE® II FOR DOGS

1Dryden MW. (1989) Host association, on-host longevity and egg production of Ctenocephalides felis felis. Vet Parasit. 34(1-2):117-122

2Safeguarding Animals From Summer Heat and Pests: World Animal Foundation website. Available at http://www.worldanimalfoundation.net/companion_animals.html#TOC-Safeguarding-Animals-from-Summer-Heat. Accessed January 12, 2017

3Grace SF. Fleas. In: Norsworthy GD, Crystal MA, Grace SF, et al., eds. (2006). The Feline Patient. 3rd ed. Ames, IA: Blackwell Publishing; 106-107